According to the Associated Press, AT&T hasn't used Woods' image extensively in advertising, but its logo appeared on his golf bag. That deal had been billed as a "multi-year" agreement when it was signed earlier this year.

Although Woods has been host of the AT&T National PGA Tour event since its 2007 inception, the company did say it would continue to sponsor that event, which will take place in July. (Woods has taken an indefinite hiatus from golf.)

Accenture and Gillette have already ended their endorsements with Woods. Swiss watchmaker TAG Heuer said earlier this month that it plans to continue its partnership with Woods but will "downscale" its presence.